* Move sysfs related functions needed to get nodes' information and tests into utils/sysfs
* Add tests for sysfs related functions
Signed-off-by: Katarzyna Kujawa <katarzyna.kujawa@intel.com>
Type can be one of "none", "noop", "deadline", "cfq".
For block devices that don't use scheduler (like dm), the type will be "none".
We'll also report "none" for partitions when we start reporting those.